योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-13, verse-12

प्राणापानतया रूढो दृढदेहगुहाशयः ।
अनन्तसिद्धिदः साधो योगोऽयं बुद्धिदः श्रृणु ॥ १२ ॥

prāṇāpānatayā rūḍho dṛḍhadehaguhāśayaḥ ,
anantasiddhidaḥ sādho yogo'yaṃ buddhidaḥ śrṛṇu 12

12. prāṇāpanatayā rūḍhaḥ dṛḍhadehaguhāśayaḥ
anantasiddhidaḥ sādho yogaḥ ayam buddhidaḥ śṛṇu

12. sādho śṛṇu ayam yogaḥ prāṇāpanatayā rūḍhaḥ
dṛḍhadehaguhāśayaḥ anantasiddhidaḥ buddhidaḥ

12. O virtuous one (sādho), listen! This spiritual discipline (yoga), which is established through the vital breaths prāṇa and apāna, and resides in the cave of the firm body, grants endless spiritual powers (siddhi) and bestows wisdom.

Words meanings summery:

• प्राणापनतया (prāṇāpanatayā) - by means of prāṇa and apāna (vital breaths)

• रूढः (rūḍhaḥ) - established, risen, mounted, grown

• दृढदेहगुहाशयः (dṛḍhadehaguhāśayaḥ) - residing in the cave of the firm body, whose dwelling is the firm body-cave

• अनन्तसिद्धिदः (anantasiddhidaḥ) - giver of endless accomplishments/spiritual powers

• साधो (sādho) - O virtuous one, O good person

• योगः (yogaḥ) - the practice of spiritual discipline (yoga) (union, conjunction, application, effort, spiritual discipline)

• अयम् (ayam) - this, this one

• बुद्धिदः (buddhidaḥ) - giver of intelligence/wisdom

• शृणु (śṛṇu) - listen, hear!

Words meanings and morphology

प्राणापनतया (prāṇāpanatayā) - by means of prāṇa and apāna (vital breaths)

(noun)

Instrumental, feminine, singular of prāṇāpanatā

prāṇāpanatā - the state of being prāṇa and apāna (vital breaths)

Compound type : tatpuruṣa (prāṇa+apāna+tā)

• prāṇa – breath, vital air, life-force, inspiration
  noun (masculine)
• apāna – downward vital air, exhalation, one of the five vital airs
  noun (masculine)
• tā – abstract suffix forming feminine nouns indicating 'the state or condition of'
  suffix (feminine)

रूढः (rūḍhaḥ) - established, risen, mounted, grown

(adjective)

Nominative, masculine, singular of rūḍha

rūḍha - risen, grown, ascended, mounted, established, conventional, famous

Past Passive Participle

Derived from root ruh (to grow, to rise)

Root: ruh (class 1)

दृढदेहगुहाशयः (dṛḍhadehaguhāśayaḥ) - residing in the cave of the firm body, whose dwelling is the firm body-cave

(adjective)

Nominative, masculine, singular of dṛḍhadehaguhāśaya

dṛḍhadehaguhāśaya - one whose abode is the cave of the firm body

Compound type : bahuvrīhi (dṛḍha+deha+guhā+āśaya)

• dṛḍha – firm, strong, solid, resolute
  adjective
• deha – body, corporeal frame
  noun (masculine)
• guhā – cave, cavern, hiding-place
  noun (feminine)
• āśaya – dwelling, abode, resting-place, intention, purpose
  noun (masculine)
  Derived from root śī (to lie) with ā- prefix
  Prefix: ā
  Root: śī (class 2)

अनन्तसिद्धिदः (anantasiddhidaḥ) - giver of endless accomplishments/spiritual powers

(adjective)

Nominative, masculine, singular of anantasiddhida

anantasiddhida - bestower of infinite spiritual powers or perfections

Compound type : tatpuruṣa (ananta+siddhi+da)

• ananta – endless, infinite, boundless, eternal
  adjective
  Prefix: an
• siddhi – accomplishment, success, perfection, spiritual power, supernatural faculty
  noun (feminine)
  action noun
  Derived from root sidh (to succeed)
  Root: sidh (class 4)
• da – giver, bestower, granting
  adjective
  nominal derivative
  Derived from root dā (to give)
  Root: dā (class 3)

साधो (sādho) - O virtuous one, O good person

(noun)

Vocative, masculine, singular of sādhu

sādhu - good, virtuous, righteous, excellent, holy man, sage

योगः (yogaḥ) - the practice of spiritual discipline (yoga) (union, conjunction, application, effort, spiritual discipline)

(noun)

Nominative, masculine, singular of yoga

yoga - union, conjunction, application, effort, spiritual discipline, meditation, a system of philosophy

Derived from root yuj (to join, to connect) with suffix ghañ

Root: yuj (class 7)

अयम् (ayam) - this, this one

(pronoun)

Nominative, masculine, singular of idam

idam - this, this one

बुद्धिदः (buddhidaḥ) - giver of intelligence/wisdom

(adjective)

Nominative, masculine, singular of buddhida

buddhida - bestower of intellect or wisdom

Compound type : tatpuruṣa (buddhi+da)

• buddhi – intellect, understanding, wisdom, perception, intelligence
  noun (feminine)
  action noun
  Derived from root budh (to know, to understand)
  Root: budh (class 1)
• da – giver, bestower, granting
  adjective
  nominal derivative
  Derived from root dā (to give)
  Root: dā (class 3)

शृणु (śṛṇu) - listen, hear!

(verb)

2nd person , singular, active, imperative (loṭ) of śru

Root: śru (class 5)